New post-sideload UI:

chrome/common/chrome_switches.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 678 matching lines @@
 
 // Marks a renderer as extension process.
 const char kExtensionProcess[]              = "extension-process";
 
 // Frequency in seconds for Extensions auto-update.
 const char kExtensionsUpdateFrequency[]     = "extensions-update-frequency";
 
 // Should we use an external Autofill popup?  Default is no.
 const char kExternalAutofillPopup[]         = "external-autofill-popup";
 
+// Should we prompt the user before allowing external extensions to install?
+// Default is yes.
+const char kExternalExtensionPrompt[]       = "external-extension-prompt";

[Yoyo Zhou, 2012/10/16 23:28:05]

naming nit: I would like prompt-for-external-extensions better.

[Matt Perry, 2012/10/17 00:02:44]

Done.

+
 // These two flags are added around the switches about:flags adds to the
 // command line. This is useful to see which switches were added by about:flags
 // on about:version. They don't have any effect.
 const char kFlagSwitchesBegin[]             = "flag-switches-begin";
 const char kFlagSwitchesEnd[]               = "flag-switches-end";
 
 // Alternative feedback server to use when submitting user feedback
 const char kFeedbackServer[]                = "feedback-server";
 
 // The file descriptor limit is set to the value of this switch, subject to the
@@ skipping 894 matching lines @@
   return true;
 #elif defined(OS_WIN)
   return true;
 #else
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableFramelessConstrainedDialogs);
 #endif
 }
 
 }  // namespace chrome